Apparatus for the rapid generation of steam.



No. 875,745. PATENTED JAN. 7, 1908. G. R. STEWARD.

APPARATUS FOR THE RAPID GENERATION 0P STEAM.

APPLICATION FILED APE.29,1907.

GEORGE RICHARD STEWARD, OF LONDON, ENGLAND.

APPARATUS FOR THE RAPID GENERATION OF STEAlVL.

- Specification of Letters Patent.

Patented Jan. '7, 1908.

Application filed April 29. 1907. Serial No. 870,800.

T 0 all whom it may concern:

Be it known that I, GEORGE RICHARD STEWARD, a citizen of the United Kingdom of Great Britain and Ireland, and resident of 28 Victoria street, London, England, have invented certain new and useful Improvements in Apparatus for the Rapid Generation of Steam, of which the following is a specification, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to steam generators of the kind comprising a series of annular Water chambers.

The object of this invention is to produce apparatus for the rapid generation of steam, which is simple in construction and economical in action.

A steam generator constructed according to my invention is built up so as to provide a series of annular water spaces or chambers connected together by steam and water ways and arranged concentrically around and above its own furnace so as to be self-contained, or it may be fitted in the flue or uptake of an independent furnace.

In the accompanying drawings, Figure 1. is a sectional elevation of my improved steam generator, and Fig. 2. is a part plan of Fig. 1. taken on the line 22. Fig. is a part plan of a modification, showing the sections separated and Fig. 4. is an isometrical projection of one of the plates thereof.

In carrying out my invention I proceed follows: I first construct inner or central tapered shells or cones a with spherical or bulblike tops I) with the cones or taper reversed. I then construct other similar shells or cones 0, but of increased diameter in order when placed concentric with the shells a to provide annular water spaces or chambers (Z between the pairs of shells a and c. The first annular sections of the steam generator are formed by securing the lower ends of the shells a and c in or to annular solid rings c, the upper ends being secured by means of the flanges (1 and c which overlap and are bolted together. In this way sections of the steam generator are built up providing water spaces of annular form closed top and bottom and constructed so as to allow the products of combustion -from the grate m to circulate through the interior and around the exterior of said annular sections as shown by the arrows in Fig. l.

The steam generator may be composed of any suitable number of these annular sections, although I prefer to use three sections as shown in the drawings, the last or outer most having its main. body, below the spherical or bulb-like top, splaycd extending or tapered outwards as shown atf in Fig. 1.

The annular sections are connected together by wateravays 9 arranged in any convenient positions and constructed so as to act as hollow stays or distance pieces to keep the various sections in proper relative positions and stiffening or strengthening the structure throughout and so located as to allow the water to circulate freely through all the sections.

The upper parts of the sections are connected together by steam-ways 71 the innermost annular section being connected to a steam coil or other form of superheater arranged within the interior of the said inner annular section, whence the superheated steam passes off to the engine by the steam outlet pipe 7.'. The water feed is supplied from the top, bottom or any intermediate part, but preferably from the top as indicated at 10,Fig. 1. Each shell forming part of an annular section of the steam generator may be made in superposed parts bolted together by means of lateral flanges 0 as shown in Figs. 1 and 2- or each may be made in parts divided longitudinally and secured by longitudinal flanges n as shown in Figs. 3 and 4 or both constructions may be adopted in the one shell.

hen the flanges are arranged laterally, in the manner shown in Figs. 1 and 2 they are preferably cut away as shown in Fig. 2, so as not to obstruct the passage through the flue of the combustion gases.

By nesting the several sections of the steam goiuirator concentrically with respect to the flue from the furnace grate and by narrowing or contracting the spherical or bulblike top thereof and tapering the lower ends in their general contour in the manner shown in Fig. 1.. I provide for the concentration of the combustion gases upon the various shells forming the separate annular sections of the generator so that no part of the combustion gases passes away through the flue without impinging upon, and thereby transferring its heat to, one or other of the shells.

Communicating with the lower end of the coil or superheater j, is apipe H ,which is also in communication with the outer water chamher. This pipe ill, has a controlling valve 12. It is the object of this pipe 11, to fill the coil or superheater j, with water while the steam is being first generated, thereby making the coil part of the generator. By closing the valve 12, the superheater is restored to its proper function.

What I claim and desire to secure by Letters Patent is 1. A steam generator comprising a series of annular sections tapered in a general contour and connected together by steam and water ways and arranged concentrically, each section comprising two smaller shells closed at the top and bottom; said sections being curved inward toward their upward ends and tapered in their general contour toward their lower ends and provided with a central passageway for the products of combustion.

2. A steam generator comprising a series of annular sections tapered in a general contour and connected together bysteam and water ways and arranged concentrically, said sections being curved inward toward their upward ends and tapered in their general contour toward their lower ends and provided with a central passageway for the products of combustion.

3. A steam generator comprising a series of annular sections tapered in a general contour and connected together by steam and water ways and arranged concentrically, said sections being curved inward toward their upward ends and tapered in their general contour toward their lower ends and provided with a central passageway for the products of combustion, and a superheater arranged in the central passageway in communication with certain of the sections.

4. Asteam generator comprising a series of annular sections tapered in a general contour and connected together by steam and water ways and arranged concentrically, said sections being curved inward toward their upward ends and tapered in their general .contour toward their lower ends and provided 'with a central passageway for the products of combustion, and a superheater arranged in the central passageway in communication with the inner and outer sections.

In witness whereof I have hereunto set my hand in presence of two witnesses.

GEORGE RICHARD STEWARD. Witnesses:

WALTER I. SKERTEN, GEO. J. B. FRANKLIN. 

